Dyn told CNBC that one of the attacks is being directed through internet connections to household appliances like DVRs and printers.

The attacks do not appear to be state-sponsored.

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[UPDATE 1:58 p.m. Oct. 21]

A fresh wave of "Distributed Denial of Service" attacks appears to have struck, centered primarily on the eastern United States.

The White House and the Department of Homeland Security have announced that they are aware of the attacks and are working to combat them, according to NBC.

One source said that North Korea has been ruled out as a potential source of the attacks.

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[UPDATE 12:45 p.m. Oct. 21]

For the second time Friday, Dyn says they are dealing with a Distributed Denial of Service attack on their infrastructure. As of 11:52 a.m. Friday, the DNS hosting service said they are monitoring a DDoS attack.

Several of the websites affected by the attack earlier this morning, including Twitter and Spotify, are again experiencing outages.

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The earlier outage was reported around 7:20 a.m. eastern time and lasted for about two hours.